xcodebuild: Fix most rebuild tests on Xcode 4.
xcodebuild: Fix most rebuild tests on Xcode 4.

BUG=chromium:175867
Review URL: https://codereview.chromium.org/12221156/
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google